Basket Strainer Supply for Pengerang Deep Water Terminal-2

Basket Strainer Supply for Pengerang Deep Water Terminal-2: A Case Study

When a deep-water oil terminal handles large tanker movements, the reliability of every inline device matters. A single piece of debris passing through a cargo pump can trigger unplanned downtime, damage seals, or throw off custody-transfer metering. That is why the Pengerang Deep Water Terminal-2 project, developed by PETRONAS, specified basket strainers at critical points in the product transfer system.

FLOWKS Valve supplied the 14-inch and 18-inch Class 150 RF basket strainers for this Malaysian marine terminal expansion. The end customer, Inland Oil and Gas Instruments Sdn. Bhd., placed the order under PO reference ASV-PO-1446. This case study walks through the project requirements, the strainer configuration, and the inspection approach that allowed the units to move from production to site without surprises.

Project Background

Pengerang is a key oil and gas hub on the southeast coast of Johor, Malaysia. The Deep Water Terminal Phase 2 expansion added berths, storage, and transfer capacity to support larger vessels and higher throughput. With deeper water than many regional ports, the terminal is designed for very large crude carriers and product tankers that cannot berth at shallower facilities.

In this kind of facility, the product flow path is straightforward but unforgiving. Cargo moves from the vessel through marine loading arms, along jetty pipelines, through booster pumps, and into tank farm manifolds. Along the way, valves, pumps, flow meters, and control equipment are exposed to whatever the cargo carries with it. Weld spatter, rust flakes, sand, and residual debris from construction or tank cleaning can all travel down the line. A basket strainer provides the first layer of mechanical protection.

The Pengerang project required equipment that could handle the low-pressure, high-flow conditions typical of marine transfer and tank farm circulation. The project team also needed documentation that would satisfy both the EPC contractor and the end operator. For a facility tied to PETRONAS, traceability, testing, and on-time delivery were non-negotiable.

Why Basket Strainers Were Selected

For the Pengerang terminal, the project team needed full-bore protection without excessive pressure loss. A basket strainer is the natural choice when the line size is large and the debris load is moderate but potentially damaging. Unlike a Y-type strainer, which fits neatly into small-bore piping, a basket strainer offers a larger screen area and lower clean pressure drop. That matters on transfer lines where flow rates are high and pump suction conditions are already tight.

The 14-inch and 18-inch nominal sizes covered the main jetty and tank farm headers. Class 150 raised-face flanges matched the surrounding carbon steel piping. The RF face is the default choice in oil terminal work because it seals reliably with standard gaskets and is easy to re-make during maintenance.

Screen material selection also reflected the service. A 316 stainless steel basket handles hydrocarbons, traces of water, and the modest corrosive potential of marine atmospheres better than plain carbon steel. At the same time, carbon steel bodies and flanges kept the overall cost in line with a terminal project that uses large quantities of similar material.

Another reason the basket strainer won over alternatives was the ease of maintenance. Terminal operators prefer equipment that can be opened and cleaned without removing the entire unit from the line. A quick-opening cover on a basket strainer lets the maintenance crew pull the screen, inspect it, and reassemble the unit in a fraction of the time required for a flanged spool piece.

Strainer Design and Materials

The basket strainers supplied for Pengerang followed conventional fabricated construction suited to large bore and moderate pressure. The bodies were specified in Gr. 70/API 5L-compatible carbon steel, with A105 forged flanges and SS316 internal baskets. This combination is common in oil and gas terminal work: the shell carries the pressure, the flanges provide a robust sealing surface, and the screen resists the product and cleaning chemicals.

Key design points included:

* Flanged RF ends for direct bolt-up to Class 150 piping.

* Quick-opening cover configuration to allow screen removal without breaking the flange joints.

* Vent and drain connections as required for safe isolation and maintenance.

* Lifting lugs on larger units to simplify handling during installation.

One detail that often gets overlooked on large strainers is the cover gasket. The supplied units used a gasket material compatible with hydrocarbon service and the temperature range expected in tropical operation. Replacing that gasket during routine maintenance is far cheaper than dealing with a leak at a jetty line after commissioning.

The choice of fabricated construction over a cast body was deliberate. For large bore strainers, fabrication allows better control over wall thickness, weld quality, and dimensional tolerances. It also avoids the lead times and pattern costs associated with large castings. In a project environment where every week counts, that flexibility is valuable.

Inspection and Testing

Before shipment, the strainers underwent the normal suite of checks expected for a carbon steel industrial strainer. Dimensional checks confirmed face-to-face lengths, flange drilling, and cover clearances against approved drawings. Visual inspection covered weld profiles, surface finish, marking, and serial traceability.

Pressure testing followed API 598 practice. The shell test verified pressure containment, while a pneumatic seat test checked cover and flange sealing. Material heat numbers were recorded on the inspection report for full traceability back to the mill certificates.

The inspection report documented the results in detail. For buyers reviewing similar reports, the key items to confirm are:

* Heat numbers for body, flange, and screen materials.

* Dimensional conformance to the approved drawing.

* Hydrostatic and pneumatic test pressures and holding times.

* Marking and serialization matching the packing list.

This level of documentation is standard for terminal projects, but it is worth emphasizing because incomplete records can delay final acceptance. When the EPC or end user audits the package, being able to connect each heat number to a mill test report saves hours of back-and-forth.

Installation and Service Conditions

At the terminal, the strainers were installed at points where the consequences of debris ingress would be highest. Typical locations include the suction side of cargo transfer pumps and upstream of flow metering skids. On a jetty line, a strainer just before the pump also protects against debris introduced during tanker connection or hose handling.

The service fluid is refined product and crude oil mixtures at ambient to moderately elevated temperatures. The Class 150 rating provides adequate pressure containment for the low-pressure transfer and tank farm circuits. In this range, a fabricated basket strainer is more economical than a cast valve-style strainer and easier to repair in the field.

One factor the project team reviewed with FLOWKS was the expected pressure drop across the screen. Because a fully loaded basket can raise differential pressure quickly, the design flow rate and allowable clean pressure drop were discussed early. For terminal projects where online calculator data may not match the actual fluid, FLOWKS provides project-specific pressure drop review based on line data such as flow rate, viscosity, specific gravity, and screen open area.

[PHOTO: Filter basket removed for inspection]

Large-Bore Strainer Fabrication vs. Casting

A question that often comes up on terminal projects is whether to use a fabricated or cast body for large basket strainers. Each approach has its place. Cast bodies work well for smaller sizes and higher pressure classes where foundries have standardized patterns. They offer smooth internal contours and consistent wall thickness when the casting is good.

For the larger sizes common in marine terminals, fabricated construction is usually the practical choice. It avoids the long lead times of large sand castings, allows custom face-to-face dimensions, and makes non-destructive testing of welds straightforward. If the project needs an unusual centerline height or special nozzle orientation, fabrication can accommodate those changes without the cost of new patterns.

At Pengerang, the fabricated design also simplified logistics. The units could be built in stages, inspected at each step, and finished in line with the EPC hookup schedule rather than waiting for a single casting delivery.

Pressure Drop and Screen Sizing

Screen sizing for a terminal basket strainer is not a guessing exercise. The open area of the basket must be large enough to keep clean pressure drop low, yet the perforation or mesh must be fine enough to catch the debris that could damage downstream equipment. In crude oil and product service, common choices range from coarse perforated plates to finer mesh constructions depending on what the pump and meter manufacturers require.

The project team exchanged operating data with FLOWKS early in the process. That allowed the screen specification to be matched to the actual duty rather than a generic catalog selection. When the service conditions change—higher viscosity in winter, different crude slate, or tank cleaning campaigns—the differential pressure across the strainer will change too. Having baseline data makes it easier for the operations team to know when cleaning is due.

If you are sizing a basket strainer for a similar project, sending the line data to the manufacturer for a project-specific pressure drop review is usually the fastest way to get a reliable answer. Generic charts are useful for first estimates, but they rarely capture the details of a real terminal operation.

Coordination with the EPC Schedule

Terminal expansion projects run on tight timelines. Equipment that arrives late can block pipework, testing, and commissioning. One reason the Pengerang supply went smoothly was the early agreement on drawing approval cycles, inspection hold points, and shipping windows.

The inspection report was issued with clear photographs of the finished units, nameplate details, and test records. That package gave the receiving team confidence that the strainers would bolt up correctly and pass site pressure tests without rework. In marine terminal work, where access to the jetty is limited and weather windows matter, avoiding rework is a significant saving.

Lessons from the Project

Several points stand out from this supply case.

First, early alignment on face-to-face dimensions and flange drilling saved time during installation. Terminal projects have tight hookup schedules, and a strainer that does not match the adjacent spool piece creates delays.

Second, material traceability is not paperwork for paperwork’s sake. When an EPC or end user audits the package, being able to connect each heat number to a mill test report matters. It is also the first thing an inspector asks for during a site visit.

Third, the quick-opening cover proved worthwhile for the operating team. Jetty and tank farm strainers need periodic cleaning, especially after new construction or tank cleaning campaigns. Reducing the time needed to pull and inspect a screen translates directly into shorter shutdown windows.

Fourth, project-specific pressure drop review helped avoid the common mistake of selecting a screen that is either too coarse to protect the equipment or too fine to handle normal flow without frequent cleaning.

Conclusion

The Pengerang Deep Water Terminal-2 project shows how a straightforward piece of equipment—a Class 150 RF basket strainer—plays a meaningful role in protecting pumps, meters, and valves in a high-volume marine terminal. By matching the body and screen materials to the service, testing to API 598, and documenting traceability, the supplied units met the expectations of a major operator like PETRONAS.

If you are planning a similar terminal, tank farm, or transfer line, FLOWKS Valve can support the mechanical design, material selection, and project-specific pressure drop review. We manufacture and supply ball valves, gate valves, globe valves, check valves, basket strainers, knife gate valves, and plug valves for oil and gas, petrochemical, and marine terminal projects worldwide.